Final answer:
Cells with cilia function in cellular locomotion and moving particles along the plasma membrane's extracellular surface, with a primary example being the movement of mucus in the respiratory system.
Step-by-step explanation:
The function of cells with cilia in the body is primarily for cellular locomotion, movement of particles along the extracellular surface of the plasma membrane, and filtration. Ciliated cells have apical plasma membrane extensions composed of microtubules capable of beating rhythmically to move substances such as mucus through ducts. This function is particularly important in the respiratory system, where cilia move mucus and trapped debris away from the lungs, and in the female reproductive system, specifically the lining of the oviduct, where cilia help move the ovum.
In the context of the multiple-choice question provided, the best option that describes the function of ciliated cells is (c) Locomotion, as this is directly related to the movement provided by cilia.